Collector-ring for dynamo-electric machines.



A. KINGSBURY. COLLECTOR RING FORVDYNAMO EILVBGTRIO MACHINES. ABPLIOATIOIY FILED JULY 28, 1909.

1,075,292. Patented 0011.7,1913.

z snnn'rswnfim; 1. Fig.7. 14 I a 12 a 16 5 4 11 15 I l 5 5 7 ATITORNEYI A. 'KINGSBURY. COLLECTOR RING FOR DYNAMO ELECTRIG MACHINES. APPLIQATION IILED JULY 28, 190 9. v 1,075 292 I Patented 0cm, 1913.

2 BIIEETSBHE INVQNTOR yuan" 7 A fT URNEY ALBERT KINGSIBURY, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 TESTING HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OFPENN- SYLYANIA.

OOLLECTdR-RING FOR DYNAMO-ELECTRIG MACHINES.

To all whom it may concern.

Be it known that I, ALBERT Kinosmmy, a citizen of the United States, and a resident of. Pittsburgh in the'county of Allegheny and State of Pennsylvania, have invented 'a new and useful Improvement 1n Collector-Rings for Dynamo-Electric Machines, of whlch the following is a specification.

My-invention relates to dynamo-electric machines, and it has special referenceto collector rings which are adapted for use with alternating current generators, rotary converters, unipolar generators and thel ke.

The object of my invention is to prov de an improved collector ring structure which shall be simple and durable and which may be readily removed without being disconnected from the windings of the machine with which it is employed.

In my co-pending application, Serial No. 471,655, I have shown and described the retatin part of a unipolar dynamo-electric machine which is rovided with a relatively large number of collector rings. When machines of this character are used for generating large quantities of electrical energy the current carried by the collector rings is very large and a large number of brushes are necessarily employed for collecting such current. Under these circumstances, the

7 working surfaces of the rings are rapidly Worn off but the connections between col-.

lector rings is such that it is extremely difficult to replace any of the rings, as they have ordinarily been constructed.

While the collector rings of my present invention are especially adapted for use under severe service conditions, such as those referred to above, they are by no means restricted to use with such machines, but are capable of general application.

According to my present invention, I provide an inner ring, to which the usualelectrical connections are made, having an annular projection to which outer ring segments are secured by any suitable means.

Figure 1 of the accompanying drawings is a sectional view of a portion of a dynamoelectric machine equipped with the collector rings of my invention. Fig. 2 is a transverse section on the line II-II of Fig. 1, looking in the direction of the arrow a and Specification or Letters 2mm.

Application filed July as, 1909. Serial No. 509,987.

Patented Oct. '7, 1 913.

Fig. 3 is a detail view of a portion of one of the rings shown in the other figures.

tcferring to the drawings, the structure here shown comprises a shaft 1, or other rotatable member, which forms part of a dynamo-electric machine, a sleeve or bushing 2 mounted thereon and collector rings 3 and 4 mounted on the sleeve or bushing and insulated therefrom. The "ings may be connected to suitable points in the winding of the machine (not shown) by means'oi conducting rods 5 which are screw-threaded into the body of the ring to which connection is made. The rods 5 are insulated by tubes or sleeves 6 and are supported by an annular projection 7 on the sleeve 2. Each of thecollector rings 3 and 4 comprises a body member 8 avhich is fittedupon the sleeve 2 after a wrapping 9 of insulation and a layer of band wire 10 for holding the same in position have been applied, and segmental contact rings 11. and 12. The body member v8 is provided with an annular projeet-ion 13 having flanges 14 which extend laterally from the end of the projection, making it substantially T-shapcd in transverse section, as shown in Figs 1 and 3: The segmental rings 11 and 12 are assembled side by side and are provided with annular grooves 15 in their adjacent surfaces which are adapted to be engaged by the flanges 14 of the projections 13 on the body member of the collector ring. Each of the segmental rings may comprise any desired number of parts, but the two rings should be so assembled that the division lines between segments do not come opposite each other. -\Vhen assembled, the two rings are clamped together by a plurality of bolts 10. The bodv portiono'f the collector ring may;

either be a continuous ring or it may be divided, as shown in Fig. 9. of the drawings, into two parts which are clamped together by bolts 17 that are tangentially arranged.

It is evident that either the body portion of the collector rings or the segn'iental rings which form-the contact surfaces, or all of these parts, may be replaced by continuous rings within the spirit and scope of my ital vention.

I claim as my invention:

1. A collector ring for dynamo-electric machines comprising a metal body ring having an integral annular projection and a pair of contact rings seated on the body ring and clamped together upon said annu lar projection.

2. A collector ring for dynamo-electric machines comprising a metal body ring having an integral annular projection of dovetail section and a pair of segmental contact rings seated on the body ring and clamped together upon said annular projection.

3. A] collector ring for dynamo-electric machines comprising a metal body ring havhaving tangential clamping bolts between segments and provided With an annular pro.- jection having lateral flanges, and a pair of segmental contact rings the adjacent surfaces of Which are notched to register with the flanges on said annular projection, and transverse clamping bolts for securing the two contact rings to each other and to said annular projection.

In testimony whereof, I have hereunto subscribed my name this 19th day of July, 1909.

ALBERT KINGSBUBY.

Witnesses V. L. lVATERs,

B. B. HINEs. 

